1 files changed, 9 insertions, 0 deletions
diff --git a/testing/mochitest/tests/browser/browser_async.js b/testing/mochitest/tests/browser/browser_async.js
new file mode 100644
index 0000000000..d07cb21740
--- /dev/null
+++ b/testing/mochitest/tests/browser/browser_async.js
@@ -0,0 +1,9 @@
+function test() {
+  waitForExplicitFinish();
+  function done() {
+    ok(true, "timeout ran");
+    finish();
+  }
+  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+  setTimeout(done, 500);
+}